Wiki - Add documentation for the pre2k LDAP module

[Reelix]

The Wiki is currently missing documentation on the pre2k module under the LDAP protocol section.

This should probably be added.

Just something I noticed as I was researching this module :)

[NeffIsBack]

Thanks for the info! If you have the time to add it feel free to open up a PR to the wiki: https://github.com/Pennyw0rth/NetExec-Wiki

Otherwise we'll add it when someone has time.

[illmob]

Tossed one in for ya
Pennyw0rth/NetExec-Wiki#88